openbook: Amanda Foreman, Dr Zhivago & Gunter Grass's memoirs

Historian Amanda Foreman talks about her new book, A World on Fire which examines Britain's role in the American Civil War. Two descendants of Boris Pasternak discuss his most famous novel, Dr Zhivago and novelist Laurence Norfolk examines the second part of the memoirs of Germany's most acclaimed living author, Gunter Grass.